This video about marine life is called Amazing and weird creatures exhibit bioluminescence – Blue Planet – BBC Earth.
From New Scientist:
Glowing insects evolved surprisingly recently
14:40 21 August 2012 by Karl Gruber
Fireflies, one of the most conspicuous of nocturnal insects, are a relatively recent addition to the twilight world. A new analysis of all bioluminescent species suggests that those living on land might be mere tens of millions of years old – a fraction of the age of bioluminescing marine groups.
Bioluminescence serves many purposes, from communication to finding mates, scaring off predators to attracting prey. Yet while many marine species bioluminesce, very few terrestrial animals have evolved the ability. Besides fireflies and a few other insects, only one snail, a few earthworms and a handful of millipedes can produce light.
To better understand this striking difference between land and sea Peter Vršanský…
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